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我是Xcode的新手，並試圖找出更多關於xcode編碼的知識。@class和#import在另一個視圖控制器上，它是什麼意思？
所以，我想更多地瞭解模型（模型操作）客觀C.
我在PhotoViewController.h @class聲明和.M感到困惑文件
，你可能會看到如下，我已經導入Photo.h上appdelegate.m也PhotoViewController.m文件
目標從我的教程是PhotoViewController.m文件可以識別self.photo.filename
但是，爲何要添加@ Class和@pro PhotoViewController.h文件中的perty？
isnt #import命令已經夠用了嗎？ @Class是什麼意思，爲什麼它也包含@property呢？
注：我試圖把註釋（//）上@class，但xcode的告訴我沒有發現照片屬性，當我把添加的註釋（//）財產
PhotoViewController.m文件也混淆了無法識別的照片屬性。
我不太明白，在同一時間使用@class和＃進口的，再加上宣佈@property照片
這裏是Photo.m
#import "Photo.h"
@implementation Photo
-(id)init
{
self = [super init];
return self;
}
@end
和
照片。^h
#import <Foundation/Foundation.h>
@interface Photo : NSObject
@property (weak, atomic) NSString *title;
@property (strong, nonatomic) NSString *detail;
@property (strong, nonatomic) NSString *filename;
@property (strong, nonatomic) NSString *thumbnail;
@end
Appdelegate.m
#import "AppDelegate.h"
#import "FeedTableViewController.h"
#import "ProfileViewController.h"
#import "FavoritesViewController.h"
#import "Photo.h"
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
Photo *photo= [[Photo alloc]init];
photo.title = @"Demo Photo";
photo.detail = @"This is a demo photo";
photo.filename = @"demo.png";
photo.thumbnail = @"demo-thumb.png";
return YES;
}
@end
PhotoViewController.h文件
#import <UIKit/UIKit.h>
@class Photo;
@interface PhotoViewController : UIViewController
@property (weak, nonatomic) NSString *imageFileName;
@property (weak, nonatomic) NSString *imageTitle;
@property (strong, nonatomic) Photo *photo;
@end
PhotoViewController.m文件
#import "PhotoViewController.h"
#import "UIImageView+AFNetworking.h"
#import "Photo.h"
@implementation PhotoViewController
-(void)viewDidLoad {
// self.title = self.imageTitle;
UIImageView *imageView = [[UIImageView alloc] init];
[imageView setImageWithURL:[UIImage imageNamed:self.photo.filename]];
imageView.frame = CGRectMake(10,10,300,300);
[self.view addSubview:imageView];
UILabel *imageTitleLabel = [[UILabel alloc] init];
imageTitleLabel.text = self.imageTitle;
imageTitleLabel.frame = CGRectMake(11,320,300,40);
[self.view addSubview:imageTitleLabel];
}
@end
[@class vs. #import]（http：// stackoverflow。com/questions/322597/class-vs-import） – Amar
並且在這裏查看更多信息：http://stackoverflow.com/questions/7378510/headers-import-versus-class –